Zap A Gap 5 Minute Fly Tying Epoxy works great when making glossy heads on saltwater flies, pike flies and muskie flies. This is a great fly tying epoxy for sealing eyes in on your large streamer flies. It also works nicely on crayfish fly patterns, shrimp fly patterns, crab patterns and other flies that may require a hard shellback. This fly tying epoxy will work well on nymph wing cases on flies like the John Barr's Copper John and other trout nymphs.